Work-holder



(No Model.)

O. R.JOHNSON. WORK HOLDER.

Patented Aug. 17,189?) k fllm/ g BY '2 sheets sheet 1. l

( No Modl.)' I I 2 Sheets- S heet 2. O. R. JOHNSON.

WORK HOLDER. No. 588,439. & Patented Aug. 17,189 '7.

A TTORNE Y S.

. UNITED STATES A PATENT rricij.

WORK-HOLDER.

SIBECIFIQATIQN forming part of Letters Patent No. 588,439, dated August17, 1897.

Application filed March 9, 1897. Serial No. 626,601. on model.)

To all whom it may concern.-

Be it known that I, OLOF R. JOHNSON, of, Escanaba, in the county ofDelta and State of Michigan, have invented a new and ImprovedhVork-Holder, of which the following is a full, clear, and exactde'scription.

The object of the invention is to provide a new and improved work-holderor benchclamp more especially designed for the use of carpenters andother mechanics and arranged to securely hold the work in place topermit the operator to conveniently place the device in position on thebench or board or other support to form a temporary bench forconveniently doing small jobs in houses and other places. 1

The invention consists principally of a bit plate, a dog fitted to slidethereon, and a disk mounted to turn in an opening in the'said dog andformed with a spiral groove engaged by a lug or pin held 011 the saidbit-plate.

The invention further consists of a device for securely fastening thebit-plate in posi-- tion on the bench, board, or like support.

The invention also consists of certain parts and details andcombinations of the same, as will be fully described hereinafter andthen pointed out in the claims.

Reference is to be had to the accompanying drawings, forminga part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is aplan View of the improvement. Fig. 2 is a side elevation ofthe same. Fig, 3 is an enlarged sectional side elevation of the end dog.Fig. 4 is a plan view of a keeper for the same. Fig.5 is an enlargedsectional side elevation of the device for moving the dogin thebit-plate. Fig. 6 is an enlarged plan View of the improvement with partsbroken out,and Fig. 7 is across-section of the same on the line 7 7 ofFig. 6.

The improveddevice is provided with a bit-plate A, adapted to rest onthe top of a bench, board, or other support B, and on the edge of theplate A are formed downwardlyextending lugs A, formed with an inclinedrow of transversely extending teeth A adapted to engage the side edge ofthe bench B, so as to securely hold the bit-plate against longitudinalmovement. On the rear edge the bit-plate A.

of the bit-plate A is formed a hook A adapted to be engaged by an openlink 0, extending transversely over the bench B and fitted toconnectwith an eye D of a plate D, on which is fulcrumed a lever E,pivotally connected by a link Efwith a rod F, fitted to slidetransversely in a bearing D formed in the said plate D. On the rod F isheld adjustably a dog F, adapted to engage the rear edge ofthe bench B,as plainly shown in Figs. 6 and 7, the said dog being secured in placeon the rod F by a set-screw F Now it will be seen that when it isdesired to fasten the bit-plate A in position the same is placed on topof the bench B, with the lugs A resting against the edge of the bench.The dog F is now adjusted. on the rod F, according to the width of thebench, with the lever E in a rearmost position, as indicated in dottedlines in Fig. 7. .The operator now takes hold of the lever E and swingsthe same forward, so as to draw the rod F and with it the dog Finwardly, to move the dog securely in contact with the rear edge of thebench B. By this movement the bit-plate A is pulled firmly in .positionand securely locked on the bench B by the lugs A and the dog F.

In case the bench B is only in the form of a board or is very narrow thelink 0 can be dispensed with and the eye D is then directly site sidesthereof are formed longitudinallyextending guideways A for the dog Gtoslide in, the said dog being formed at its outer end with teeth orpoints G, adapted to engage the work at one end. In the bod) of the dogG is formed a circular opening G", into which fits a disk H, so as topermit of turning the said disk, the latter being formed with a spiralgroove H, engaged by a friction-roller I, held on a stud or pinextending upwardly from (See Fig. 6.) 7

On the disk 11 is secured by set-screws or other means a cover H formedat its rear end with apertures H registering with recesses 11*, formedin the .top of the disk H, extending slightly beyond the rear ends ofthe openings H to permit the entrance of the foot J of the forked end ofa lever J, resting on the top of the cover H and formed with a handle Jto permit the operator to conveniently turn the cover on the disk H, soas to cause a forward or backwardmovement of the dog G, owing to thefriction-roller I engaging the engaging the end of the board.

spiral groove II in the said disk 11. Thus by the arrangement describedthe operator can conveniently move the dog G forward or backward, so asto engage or disengage the teeth G with or from the work. hen the workis engaged by the teeth G, the operator can conveniently remove thelever or handle J, so as to permit of giving free access to the end ofthe work engaged by the teeth G.

The outer end of the work is adapted to be engaged by a dog K, formedwith a body K, screwed or otherwise fastened to the bench B and formedwith two forwardly-extending toothed prongs K for the work to restagainst.

\Vhen it is desired to operate on boards placed 011 edge, as indicatedin Figs. 1 and 2, then I employ dogs L and N, of which the dog L is heldremovably on the dog G and is formed with a standard carrying a pin L,The dog N is removably held in the dog K and is provided with a base N,having a lip N adapted to engage a shoulder K on the body K of the dogK, and the base N is provided with a pin N adapted to engage a recess inthe said body. From the base N rises a standard N in the upper end ofwhich screws the longitudinally-extending screw-rod N pointed at itsforward end to engage the end of the work directly opposite the point L.The screw-rod N is formed at its rear end with a suitable handle orcrank-arm N to permit the operator to conveniently turn the screwrod tomove its point in and out of engagement with the work. A keeper 0, bentin a U-shaped form, fits with its bottom part into a recess in the bodyK and is held in position thereon by one of the screws used forfastening the body to the bench, the screw passing through an elongatedaperture 0 in the keeper. The upwardly-turned end 0 of the keeper passesover the rear end of the base N, so as to prevent the latter fromaccidental disengagement from the body K. The base of the dog L isprovided with a lip and pin similar to the lip N and pin N of the dog N,as previously described, and engaging corresponding shoulders andrecesses in the dog G. It will be seen that the auxiliary dogs L and Nare very serviceable for conveniently holding boards upon edge and forholding work in an inclined position, it being understood that in thiscase the work can be engaged by the points of the dogs L and N, as wellas by the dogs G and K.

If the work to be operated on is to be turned, it can be readilyfastened on the point L and the point of the screw-rod N and turnedthereon as centers.

Having thus fully described my invention, 1 claim as new and desire tosecure by Letters Patent 1. A bench-dog, comprising a plate having oneend toothed and a hole in the body thereof giving access to aforwardly-extending recess, a standard having a lip adapted to entersaid hole and engaging the under side of the plate and having a pointeddog or center, and a longitudinally-adjustable bent plate forming a yoketo engage the rear edge of the standard-base to hold it down,substantially as specified.

2. A bench-dog, comprising a plate having one end toothed, a hole in thebody thereof communicating with a forwardly-extending recess and alongitudinal recess opening to its rear end, a standard having alongitudinallyextending point or center, a base provided with aforwardly-extendinglip adapted to enter said hole and engaging the underside of' the plate, and a bar lying longitudinally in the rear recessbeneath the plate and having its outer or rear ends bent upward andforward to engage the rear edge of the standardbase, substantially asdescribed.

3. A bench-dog, comprising a plate having one end toothed, a hole in thebody thereof communicating with a forwardly-extending recess and alongitudinal recess opening at its rear end, a standard having alongitudinally-extending point or center, a base provided with aforwardly-extending lip adapted to enter said hole and engaging theunder side of the plate, a bar lying longitudinally in the rear recessbeneath the plate and having its outer or rear ends bent upward andforward to engage the rear edge of the standard-base, said base andplate having registering projections and recesses preventing slidingtherebctween, substantially as described.

4. A bench-dog, comprising a plate having the end portions of the outerside edge bent forward and provided with inwardly-extending points andhaving the remainder of the same edge and portions of the opposite edgebent upward and inward forming a guideway, a dog-plate sliding therein,an adjustable lever connecting said two plates, and clamping means ofadjustable length connected to the inner side of the bottom plate andengaging the opposite side of the bench or board, substantially asdescribed.

5. A device of the class described, provided with a fixed dog, alongitudinally-movable dog, and two removable dogs held on the saidfixed and the said movable dog, substantially as shown and described.

6. A device of the class described, provided with a fixed dog, alongitudinally-movable dog, and two removable dogs held on the saidfixed and the said movable dog, the said removable dogs being providedwith alined points,substantially as shown and described.

7. A device of the class described, provided with a fixed dog, and a dogheld removably thereon, formed with a standard, and a screwrod mountedto turn in the said standard, substantially as shown and described.

8. A benchdog, comprising a plate having the end portions of the outerside edge bent downward and provided with inwardly-extending points andhaving the remainder of the same edge and portions of the opposite edgebent upward and inward forming a guideway, a dog-plate sliding thereinhaving a circular hole, a circular plate fitting said hole and having aspiral cam-groove therein, a pin or roller attached to the lower plateand entering said spiral cam or groove, an operating-lever connected tosaid circular plate, and clamping means of adjustable length connectedto the inner edge of the bottom plate and engaging the opposite side 'ofa bench or board, substantially as described.

9. A bench-dog, comprising a plate which is forked at one end and hasthese ends notched,. a standard removably secured to said plate andprovided with a center which is above and in line with the center of thenotch in said plate, substantially as described. 10. A bench-dog,comprising a plate which is forked and has the ends of said forksnotched, a removable standard secured to said plate, and ascrew-threaded bar supported in said standard above and in line with thenotch in said plate and having'its end pointed to act as a center,substantially as described.

OLOF R. JOHNSON. Witnesses:

O; V. LINDEN, CLARA HAMACHER.

